نتایج جستجو برای: tree species

تعداد نتایج: 692962  

Journal: :caspian journal of environmental sciences 2011
o. rafieyan al. et

this study is a contribution to assess the high resolution digital aerial imagery for semi-automatic analysis of tree species identification. to maximize the benefit of such data, the object-based classification was conducted in a mixed forest plantation. two subsets of an ultracam d image were geometrically corrected using aero-triangulation method. some appropriate transformations were perfor...

Crataegus pontica, Cerasus microcarpa and Amigdalus orientalis are from important accompanying woody plant species in Zagros forests and their regeneration dynamic helps to improve the regeneration of tree species. This research was carried out with the aim of investigating and recognizing the regeneration establishment pattern of C. pontica, C. microcarpa and A. orientalis in three forest site...

Loghman Ghahramany Mahmood Zobeiri Manocher Namiranian Maziar Haidari

For maintaining of Zagros forests role in wild life, water and soil conservation, the suitable solutions and methods for assessing the existing conditions and planning for management of this forests should be given. To detection of suitable sampling method to study tree density in the northern Zagros forest, Blake forest, in Baneeh region, Kurdistan province, and west of Iran was selected. 40 s...

D. Azadfar M. Daylam-jafarabad, M.H. Arzanesh

Heavy metals found in urban air with its toxic effects have a direct impact on human health. Selection of appropriate tree species and shrub refining capacity of heavy metals in urban areas can greatly reduce the toxic effects of these materials. This study aimed to identify the most suitable tree and shrub species of broadleaf evergreen, deciduous and coniferous refinement of heavy metals lead...

Loghman Ghahramany Mahmood Zobeiri Manocher Namiranian Maziar Haidari

For maintaining of Zagros forests role in wild life, water and soil conservation, the suitable solutions and methods for assessing the existing conditions and planning for management of this forests should be given. To detection of suitable sampling method to study tree density in the northern Zagros forest, Blake forest, in Baneeh region, Kurdistan province, and west of Iran was selected. 40 s...

Journal: :international journal of advanced biological and biomedical research 2013
m. daylam-jafarabad d. azadfar m.h. arzanesh

heavy metals found in urban air with its toxic effects have a direct impact on human health. selection of appropriate tree species and shrub refining capacity of heavy metals in urban areas can greatly reduce the toxic effects of these materials. this study aimed to identify the most suitable tree and shrub species of broadleaf evergreen, deciduous and coniferous refinement of heavy metals lead...

Journal: :جنگل و فرآورده های چوب 0
مهدی کاکاوند دانشجوی کارشناسی ارشد، دانشکدة منابع طبیعی، دانشگاه تهران، کرج، ایران محمدرضا مروی مهاجر استاد گروه جنگل داری و اقتصاد جنگل دانشکدة منابع طبیعی، دانشگاه تهران، کرج، ایران خسرو ثاقب طالبی دانشیار پژوهش، مؤسسة تحقیقات جنگل ها و مراتع کشور، تهران، ایران کیومرث سفیدی استادیار، دانشگاه محقق اردبیلی، دانشکدة منابع طبیعی، اردبیل، ایران

this study was designed to investigate the structural characteristics of beech forests in the middle stage of ecological succession. in order to this purpose undisturbed beech stands in kheyroud forest had chosen and three one hectare sampling plot laid out. all of tree species measured with full callipering method and diameter and height of trees were recorded. natural regeneration within one ...

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